From: djw@t-chip.com.cn
To: linux-rockchip@lists.infradead.org
Cc: Wayne Chou <zxf@t-chip.com.cn>, Levin Du <djw@t-chip.com.cn>,
Heiko Stuebner <heiko@sntech.de>,
linux-gpio@vger.kernel.org,
Linus Walleij <linus.walleij@linaro.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v1 1/5] gpio: syscon: allow fetching syscon from parent node
Date: Thu, 10 May 2018 17:16:36 +0800 [thread overview]
Message-ID: <1525943800-14095-2-git-send-email-djw@t-chip.com.cn> (raw)
In-Reply-To: <1525943800-14095-1-git-send-email-djw@t-chip.com.cn>
From: Heiko Stuebner <heiko@sntech.de>
Syscon nodes can be a simple-mfd and the syscon-users then be declared
as children of this node. That way the parent-child structure can be
better represented for devices that are fully embedded in the syscon.
Therefore allow getting the syscon from the parent if neither
a special compatible nor a gpio,syscon-dev property is defined.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Levin Du <djw@t-chip.com.cn>
---
Changes in v1:
- New
drivers/gpio/gpio-syscon.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpio/gpio-syscon.c b/drivers/gpio/gpio-syscon.c
index 537cec7..7325b86 100644
--- a/drivers/gpio/gpio-syscon.c
+++ b/drivers/gpio/gpio-syscon.c
@@ -205,6 +205,8 @@ static int syscon_gpio_probe(struct platform_device *pdev)
} else {
priv->syscon =
syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");
+ if (IS_ERR(priv->syscon) && np->parent)
+ priv->syscon = syscon_node_to_regmap(np->parent);
if (IS_ERR(priv->syscon))
return PTR_ERR(priv->syscon);
--
2.7.4
next prev parent reply other threads:[~2018-05-10 9:17 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-10 9:16 [PATCH v1 0/5] Add sdmmc UHS support to ROC-RK3328-CC board djw
2018-05-10 9:16 ` djw [this message]
2018-05-10 9:16 ` [PATCH v1 2/5] gpio: syscon: Add gpio-syscon for rockchip djw
2018-05-10 14:56 ` Robin Murphy
2018-05-11 2:16 ` Levin Du
2018-05-10 9:16 ` [PATCH v1 3/5] arm64: dts: rockchip: Add gpio-syscon10 to rk3328 djw
2018-05-10 12:50 ` Robin Murphy
2018-05-11 3:45 ` Levin Du
2018-05-11 12:24 ` Rob Herring
2018-05-14 1:28 ` Levin Du
2018-05-11 12:22 ` Rob Herring
2018-05-14 1:22 ` Levin Du
2018-05-10 9:16 ` [PATCH v1 4/5] arm64: dts: rockchip: Add io-domain to roc-rk3328-cc djw
2018-05-10 9:27 ` djw
2018-05-10 9:28 ` [PATCH v1 5/5] arm64: dts: rockchip: Add sdmmc UHS support for roc-rk3328-cc djw
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